Fluid Delivery Device With Passageway Closing Structure
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Solution Overview
Problem
Existing fluid delivery devices require frequent skin puncture for medication administration, which is inconvenient and painful for users, especially for conditions like diabetes that require regular insulin injections.
Innovation Solution
The development of a fluid delivery device with a multi-piece body, cannula, needle guide, and septum design that allows for extended use without repeated needle punctures, featuring a passageway closing structure that can be actuated to alternate fluid flow between multiple passageways, and integration with infusion pumps for efficient medication delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional fluid delivery devices are used with repeated needle punctures, then medication can be administered, but user discomfort and inconvenience increase with frequent use
Solution Approach 1:
The device divides the fluid delivery system into separate components: a reusable body with cannula that remains inserted in the patient, and disposable injection devices (syringes or pumps) that deliver medication through the cannula. This segmentation eliminates repeated skin punctures while maintaining medication delivery capability.
Solution Approach 2:
The cannula is inserted into the patient's subcutaneous tissue in advance and left in place for extended periods (days to weeks). This preliminary action of establishing access beforehand eliminates the need for repeated skin punctures during the infusion period.
2Adaptability or versatility
If a single passageway is used for fluid delivery, then the device structure is simple, but the device cannot accommodate multiple fluid delivery methods (pump and syringe)
Solution Approach 1:
The device body incorporates multiple passageways (first and second fluid delivery passageways) that can accommodate different types of injection devices. The passageway closing structure allows selective blocking of individual passageways, enabling the same device to work with either pump-driven or syringe-driven fluid delivery methods.
Solution Approach 2:
The passageway closing structure can be dynamically positioned to block either the first or second passageway, allowing the device to adapt its configuration based on which injection device is being used. This dynamic adjustment provides versatility without requiring multiple dedicated devices.
3Loss of time
If the cannula is left inserted for extended periods, then repeated skin punctures are avoided, but the risk of infection and tissue damage increases
Solution Approach 1:
The injection devices (syringes and pumps) are designed as disposable single-use items that are discarded after one use, while the cannula and body form a reusable system that can be safely left in place for extended periods. This approach minimizes contamination risk from repeated needle insertions.
Solution Approach 2:
The injection device is nested within or connected to the device body, with the syringe or pump delivering medication through the already-inserted cannula. This nested configuration protects the cannula insertion site and reduces exposure to external contaminants.
Data Source
AI summary
Fluid delivery devices, systems and methods. The fluid delivery devices may be used to delivery fluid (e.g., insulin) to a user. The devices may have one or more inlets, and may be configured for use with an injection device, such as a syringe, and/or with a pump.